Results 81 to 90 of about 28,608 (299)
Metamorphic Inheritance, Lower‐Crustal Earthquakes, and Continental Rifting
The Malawi Rift is localized within Precambrian amphibolite‐granulite facies metamorphic belts, bounded by up to 150 km long border faults, and generates earthquakes throughout ∼40 km thick crust.
Å. Fagereng+3 more
doaj +1 more source
Pegmatites of Southern California [PDF]
For many years the southern California region has attracted the attention of geologists interested in pegmatites and pegmatite deposits, largely because of the well-known gem and lithium occurrences in San Diego and Riverside Counties. These world-famous
Jahns, Richard H.
core
Archaeological Geology of Jurash, ʿAsīr Province, Southwestern Saudi Arabia
ABSTRACT The Jurash archaeological site is located on Wādī Bīshah near the city of Khamīs Mushayt in southwestern Saudi Arabia. It has a fort and other remains from the pre‐Islamic period (third century bc to early seventh century ad) and a settlement with two mosques from the Early Islamic period (early seventh to early 11th centuries ad).
James A. Harrell
wiley +1 more source
IntroductionThe east-west trending Khondalite Belt, located on the northern margin of the North China Craton, is linked to the Paleoproterozoic Columbia supercontinent’s evolution.
Hao Hu+6 more
doaj +1 more source
How large are departures from lithostatic pressure? Constraints from host-inclusion elasticity [PDF]
Minerals trapped as inclusions within other host minerals will develop non-lithostatic pressures during both prograde and retrograde metamorphism because of the differences between the thermo-elastic properties of the host and inclusion phases.
Adams+39 more
core +1 more source
Tracking Bronze Age ‘itinerant smiths’ in western Poland: insights from Nd and Sr isotope data
Abstract The neodymium (Nd) isotope composition of stone casting moulds found in graves of Bronze Age ‘itinerant smiths’ in western Poland was analysed to determine the provenance of their raw materials. For the first time in archaeological research, the Nd model age (TDM)—a highly useful parameter in studying the provenance of geological materials—has
Mateusz Stróżyk+5 more
wiley +1 more source
Electron Microprobe Reintegration Method for Clinopyroxene Breakdown with Lamellae Exsolution
Pyroxene is an important rock-forming mineral in magmatic to metamorphic rocks, which often possesses certain breakdown texture with lamellae exsolution under temperature and pressure changes.
Xiaoli LI, Lifei ZHANG
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Garnet–monazite rare earth element relationships in sub-solidus metapelites: a case study from Bhutan [PDF]
A key aim of modern metamorphic geochronology is to constrain precise and accurate rates and timescales of tectonic processes. One promising approach in amphibolite and granulite-facies rocks links the geochronological information recorded in zoned ...
Argles, Tom W.+5 more
core +9 more sources
Accessory minerals: a provenancing tool for steatite quarries
Abstract Steatite has been a widely traded material across a range of archaeological contexts. Yet, challenges inherent to determining its provenance limits our understanding of the networks and mechanisms of its exchange. We present a robust new accessory mineral provenancing “fingerprint” method based their specific growth history.
Riia Chmielowski+2 more
wiley +1 more source
DOI:10.17014/ijog.3.2.77-94Bayat Complex is usually used as a work field for students of geology and other geosciences. The study area is located in the southern part of the Bayat Complex.
Sri Mulyaningsih
doaj +1 more source